import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/User.vue'
import Rights from './components/power/Rights.vue'
import Roles from './components/power/Roles.vue'

Vue.use(VueRouter)

const router = new VueRouter({
    routes: [
        { path: '/', redirect: '/login' },
        { path: '/login', component: Login },
        {
            path: '/home', 
            component: Home,
            redirect: '/welcome',
            children: [
                { path: '/welcome', component: Welcome},
                { path: '/users', component: Users },
                { path: '/rights', component: Rights },
                { path: '/roles', component: Roles }
        ]
        }
    ]
})


// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 代表从哪个路径跳转而来
    // next是一个函数，表示放行
    if (to.path === '/login') {
        return next()
    }
    // 获取token
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) {
        return next('/login')
    }
  next()
})

export default router
